<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!-- 登录表单区 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop='username'>
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop='password'>
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 表单校验
      loginFormRules: {
         username: [
            { required: true, message: '请输入用户名', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
         password: [
            { required: true, message: '请输入密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
      }
    }
  },
  methods: {
    //点击重置按钮
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      console.log(this);
      this.$refs.loginFormRef.validate(async valid => {
        if(!valid) return;
        const {data: res} = await this.$http.post('login',this.loginForm);
        if(res.meta.status !== 200) return this.$message.error("登录失败！");
        this.$message.success("登陆成功！");
        //1、将登录成功之后的token，保存到客户端的 sessionStorage中
        // 1.1、项目中除了登录之外的其他API接口，必须在登录之后才能访问
        // 1.2、token 只应在当前网站打开期间生效，所以将 token 保存在 sessionStorage 中
        window.sessionStorage.setItem("token",res.data.token);
        //2、通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push("/home")
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container{
  height: 100%;
  background-image: linear-gradient(to bottom right, rgb(206, 231, 238) ,rgb(5, 169, 190));

}
//中间盒子样式
.login_box{
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 50px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  box-shadow: 10px 10px 10px rgb(78, 77, 77);
}
//头像
.avatar_box{
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  position: absolute;
  left: 50%;
  transform: translate(-50%,-50%);
  background-color: #ddd;
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
  }
}
.login_form{
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box
}
.btns{
  display: flex;
  justify-content: flex-end;
}
</style>